update_mir_test_checks: Add "mir" to some states and regex names

For tests that do lowering we need to support IR as input, so here we
clarify some names to avoid ambiguity in upcoming commits.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321039 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed